Schneider Electric SE QOB345 Circuit Breakers

Schneider Electric’s Square D QOB345 is a three‑pole, 45 A miniature circuit breaker designed for bolt‑on mounting in QOB panelboards and other QO/QOB load centers. It is rated for 120/240 V AC with a 10 kA short‑circuit interrupting capability, providing reliable protection for three‑phase circuits and multi‑wire branch circuits in commercial or light‑industrial distributions. The device employs thermal‑magnetic trip technology and features a common‑trip mechanism across all three poles to ensure simultaneous disconnection on overcurrent events. As part of the QO/QOB family, the QOB345 offers a robust, field‑replaceable protection option for circuits such as motors, compressors, and other three‑phase loads within compatible Schneider Electric panels, aligning with standard form‑factor bolt‑on breakers used in many existing installations.